This meta-analysis suggested that abdominal obesity as measured by waist circumference and waist-hip ratio might be associated with an increased risk of hip fracture. From a public health perspective, indicators of abdominal obesity may be usable predictors of hip fracture risk.
Shell wastes represent a considerable quantity of byproducts in the coastal area. From the viewpoint of ecofriendly and economical disposal, shell wastes are dissolved in formic acid to prepare an ionic liquid at room temperature and dissolve silk fibers to prepare a spinning solution. In this study, we developed conductive filaments made of silk fibroin (SF) and polyaniline (PANI) with wet-spinning techniques and a water coagulation bath. We then evaluated its surface morphologies and structural, mechanical, and electrical properties. The average diameters of the SF-PANI filaments increased with SF concentration from 8.0 to 14.0 wt % when PANI content was 0.1 wt %. The structure of SF-PANI filaments included the coexistence of silk I and silk II and was not affected by the addition of PANI. Moreover, the stress and strain of the SF-PANI filament were 4.46 ± 0.57 MPa and 16.18 ± 2.35%, respectively. After three drafts, the stress and strain of the SF-PANI filaments reached their maxima: 22.08 ± 0.2 MPa and 63.2 ± 2.56%, respectively. In addition, the electrical properties of the SF-PANI filaments increased with the addition of PANI. Thus, all data in this study suggest that recycled shell wastes can be reused as dissolution systems to prepare SF-based functional conductive filaments. formic acid (FA)-CaCl 2 , FA-hydroxyapatite, and other solvents for the direct spinning of the fibers. 7,8 Moreover, we found that SF fibers were also easily dissolved in an FA-shell solution. An SF-FA-shell solution was directly used to spin filaments.Additional Supporting Information may be found in the online version of this article.X. Li and J. Ming contributed equally to this article.
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